Purchase LM2798, In-stock LM2798 From SeekIC.
Part Number: LM2798
Description: The LM2797/98 switched capacitor step-down DC/DC converters efficiently produce a 120mA regulated low-...
- Table of contents:
LM2798
-
Suppliers
DataSheet
General Description
LM2798 General Description
The LM2797/98 switched capacitor step-down DC/DC converters efficiently produce a 120mA regulated low-voltage rail from a 2.6V to 5.5V input. Fixed output voltage options of 1.5V, 1.8V, and 2.0V are available. The LM2797/98 uses multiple fractional gain configurations to maximize conversion efficiency over the entire input voltage and output current ranges. Also contributing to high overall efficiency is the extremely low supply current of the LM2797/98: 35A operating unloaded and 0.1A in shutdown.
Features of the LM2797/98 include input voltage and output voltage monitoring. Pin BATOK provides battery monitoring by indicating when the input voltage is above 2.85V (typ.). Pin POK verifies that the output voltage is not more than 5% (typ.) below the nominal output voltage of the part.
The optimal external component requirements of the LM2797/98 solution minimize size and cost, making the part ideal for Li-Ion and other battery powered designs. Two 1F flying capacitors and two 10F bypass capacitors are all that is required, and no inductors are needed.
The LM2797/98 also features short-circuit protection overtemperature protection, and soft-start circuitry to prevent excessive inrush currents. The LM2798 has a 400s turn-on time. The turn-on time of the LM2797 is 100s.
LM2798 Maximum Ratings
If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/Distributors for availability and specifications.
| VIN, EN, POK, BATOK pins: Voltage to Ground (Note 3) |
−0.3V to 5.6V |
| Junction Temperature (TJ-MAX-ABS) | 150°C |
| Continuous Power Dissipation (Note 4) |
Internally Limited |
| VOUT Short-Circuit to GND Duration (Note 4) |
Unlimited |
| Storage Temperature Range | −65°C to 150°C |
| Lead Temperature (Soldering, 5 Sec.) |
260°C |
| ESD Rating (Note 5) Human-body model: |
2 kV |
| Machine model | 200V |
LM2798 Features
Output voltage options:2.0V ± 5%, 1.8V ± 5%, and 1.5V ± 6%
120mA output current capability
Multi-Gain and Gain Hopping for Highest Possible Efficiency - up to 90% Efficient
2.6V to 5.5V input range
Input and Output Voltage Monitoring (BATOK and POK)
Low operating supply current: 35A
Shutdown supply current: 0.1A
Thermal and short circuit protection
LM2798 turn-on time: 400s LM2797 turn-on time: 100s
Available in an 10-Pin MSOP Package
120mA output current capability
Multi-Gain and Gain Hopping for Highest Possible Efficiency - up to 90% Efficient
2.6V to 5.5V input range
Input and Output Voltage Monitoring (BATOK and POK)
Low operating supply current: 35A
Shutdown supply current: 0.1A
Thermal and short circuit protection
LM2798 turn-on time: 400s LM2797 turn-on time: 100s
Available in an 10-Pin MSOP Package
LM2798 Typical Application
Cellular Phones
Pagers
H/PC and P/PC Devices
Portable Electronic Equipment
Handheld Instrumentation
Pagers
H/PC and P/PC Devices
Portable Electronic Equipment
Handheld Instrumentation
LM2798 Connection Diagram
LM2798
PDF/DataSheet Download
- Datasheet: LM2798
- File Size: 397403 KB
- Manufacturer: NS
- Click here to Download
- ·LM20
- NSC [National Semiconductor]
- LM20 2.4V, 10レA, SC70, micro SMD Temperature Sensor
- 223381 KB
- ·LM2002
- NSC [National Semiconductor]
- 8 Watt Audio Power Amplifier
- 135029 KB
- ·LM2002AT
- NSC [National Semiconductor]
- 8 Watt Audio Power Amplifier
- 135029 KB
- ·LM2002T
- NSC [National Semiconductor]
- 8 Watt Audio Power Amplifier
- 135029 KB
- ·LM2005
- NSC [National Semiconductor]
- LM2005 20 Watt Automotive Power Amplifier
- 210626 KB
- ·LM2005T-M
- NSC [National Semiconductor]
- LM2005 20 Watt Automotive Power Amplifier
- 210626 KB
- ·LM2005T-S
- NSC [National Semiconductor]
- LM2005 20 Watt Automotive Power Amplifier
- 210626 KB
- ·LM201A
- MOTOROLA [Motorola, Inc]
- Amplifiers and Comparators
- 133828 KB
LM2798 Relative Products
LM2797MMX-1.8
IC CONVERTER DC/DC SW CAP 10MSOP
LM2797MM-1.8
IC CONVERTER DC/DC 120MA 10-MSOP
LM2797
The LM2797/98 switched capacitor step-down DC/DC converters efficiently produce a 120mA regulated low-voltage rail from a 2.6V to 5.5V input. Fixed output voltage options of 1.5V, 1.8V, and 2.0V are available. The LM2797/98 uses multiple fractional gain conf...
LM2796TLX/NOPB
IC LED DRVR WHT BCKLT 18MICROSMD
LM2796TLEV
BOARD EVALUATION LM2796TL
-
LM2796TL/NOPB
IC LED DRVR WHT BCKLT 18MICROSMD
Hotspot Suppliers Product
6DI15A-050
Price: 25-29 USD
power transistor module, 600V, 15A, 80W, 6DI15A-050, Fuji Electric
PD10016
Price: 18.5-19.5 USD
diode module, PD10016, Nihon
K9F1G08UOC-PCBO
Price: 1-2 USD
K9F1G08UOC-PCBO, Integrated Circuits, BGA, Samsung semiconductor
TLP521-1GB
Price: 0.5-2 USD
TLP521-1 programmable controllers ac/dc-input module solid state relay
2SC3357-T1
Price: 0.03-0.08 USD
NPN, epitaxial silicon transistor, 20V, 100 mA, 1200 mW, SOT89
ADS1256IDBR
Price: 6.7-7.1 USD
extremely low-noise, 24-bit, analog-to-digital converter, 28-SSOP, -0.3 to +6 V, Fast Channel Cycl...
SR240
Price: 0.05-0.1 USD
schottky barrier rectifier, smd, 2.0A
IA5320TH
Price: 35-40 USD
IA5320TH, Nippon Precision Circuits Inc, MODULE
LA4705
Price: 1-2 USD
LA4705 - 15 W 2-channel BTL AF Power Amplifier for Car Stereos - Sanyo Semicon Device
MD2202-D32
Price: 18-20 USD
Disk OnChip 2000 DIP, module, -0.5 to 4.6 V, -10 to 10 mA, Single-chip, plug-n-play flash disk
TLP521-2
Price: 0.22-0.3 USD
photocoupler, DIP, 50mA, 2500Vrms, UL recognized, two isolated channels, Toshiba Semiconductor
XC4VFX100-11FF1152I
Price: 300-1000 USD
IC FPGA VIRTEX-4FX 1517FFBGA - XC4VFX100-11FF1152I
